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An explosion proof vfd in motor is a kind of motor that can be used in flammable and explosive places, and does not generate electric sparks during operation. Explosion-proof motors are mainly used in coal mines, oil and gas, petrochemical and chemical industries. In addition, it is also widely used in textile, metallurgy, urban gas, transportation, grain and oil processing, papermaking, medicine and other departments. As the transmission substation equipment, explosion-proof motors are usually used to drive pumps, fans, compressors and other transmission machinery. The winding is an important part of the explosion-proof motor. To maintain the winding, the rotor must be pulled out from the stator. What are the cleaning methods?

1. Cleaning methods of explosion proof motor windings

(1) Dry wipping. When the surface to be cleaned is easily accessible and all that is to be removed is dry dust, dry wiping with a clean, lint-free cloth is satisfactory. Recycled cloth cannot be used because the fluff will stick to the insulation and increase the accumulation of dust. Fluff is particularly detrimental to the insulation of high-voltage motors because of the potential for corona discharge.

(2) Brush and suction cleaning method. Dry dust can be removed by brushing with a short, stiff bristle brush (metal brushes are not allowed). Vacuum clean again. This is an optimal cleaning method because dust does not spread and deposit on other equipment.

(3) To blow it. Blow off the dust with a jet of dry air, only in the gaps that are almost inaccessible by hand and the motor must not be wet, the direction of the air blowing should be such that the dust is not carried deep inside the explosion proof motor, so as not to be difficult to remove and may block the ventilation passages.

2. Daily maintenance of explosion proof motors

The daily maintenance of explosion proof VFD is mainly to create a good environment for the healthy work of the motor, to avoid rust and rust spots on the explosion proof surface of the motor, to ensure that the contact surfaces are in tight contact, to prevent harmful media from taking advantage, and to corrode the internal parts and winding insulation of the machine.

Therefore, the following work needs to be done:

The first is to keep the working environment of the motor clean and dry.

The second is moisture-proof and waterproof. For explosion proof motors operating in humid environments, avoiding the accumulation of water inside the motor and maintaining the stability of the motor coil and insulation are prerequisites to ensure the safe operation of the motor. The moisture-proof and waterproof effect of the explosion proof motor mainly depends on the protection work done by the motor shell, which can prevent the moisture on the surface of the motor from entering the machine.

The third is to keep the surface of the VFD frequency converter clean to ensure that the air inlet should not be obstructed by dust.

The fourth is to ensure good lubrication of the motor during operation. Once the bearing is found to be overheated or the lubrication is deteriorated during operation, the lubricating oil should be replaced in time.